Question: When did Irkutsk cease to become part of the Tobolsk Province?
Paraphrase: In what year did Irkutsk separate from the Tobolsk Province?
SPARQL (Wikidata): SELECT ?value WHERE { wd:Q6576 p:P131 ?s . ?s ps:P131 wd:Q4459143 . ?s pq:P582 ?value}